[[HiC]TheKiller]

Cant you just use randoms?

Code:

new Random = random(3);
if(Random == 2)
{
  //25%
  new R2 = random(5); 
  if(R2 == 4)
  {
    //20%
    new r3 = random(100);
    new r4 = random(100);
    if(r4 >= r3)//Chooses a random percentage chance then a random # 
    {
     //Done
    }
  }
}

Not sure if this would work (Just guessing from what you said).